A soft metal or nonmetal sleeve, designed to mate with a pin-rivet. it may include an external wrenching facility which breaks off at a perdetermined torque to form a head.
NSN 5996-01-651-4195
NSN 6650-00-144-4555
NSN 6320-01-141-3791
NSN 5905-00-935-8539
NSN 6320-00-521-9350
NSN 5998-00-813-5393
NSN 4140-01-544-0096
NSN 5920-01-384-4835
NSN 5855-00-160-2286
NSN 6610-01-593-8179
NSN 5960-01-411-5899
NSN 6620-01-346-6575